Patents by Inventor Takayuki Toshima

Takayuki Toshima has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 6503003
    Abstract: A solvent of a resist solution is dropped from a solvent supply nozzle onto the surface of a semiconductor wafer held by a spin chuck. The semiconductor wafer is rotated by the spin chuck to spread the resist solution over the entire surface of the semiconductor wafer W. Simultaneously, the resist solution is dropped from a resist solution supply nozzle onto the semiconductor wafer and spread following the solvent. During the processing, the processing space is isolated from the outer atmosphere by closing a lid of a processing vessel and a sprayed solvent is supplied into the processing space. The processing space is thus filled with the mist of solvent. In the processing space supplied with the solvent, evaporation of the solvent from the resist solution is suppressed. A film of the resist solution is formed with a uniform film thickness to the edge of the semiconductor wafer W.
    Type: Grant
    Filed: March 26, 2001
    Date of Patent: January 7, 2003
    Assignee: Tokyo Electron Limited
    Inventors: Keizo Hasebe, Shuuichi Nishikido, Nobuo Konishi, Takayuki Toshima, Kazutoshi Yoshioka
  • Publication number: 20020185225
    Abstract: After semiconductor wafers W have been processed with ozone gas and steam fed into a processing vessel 10, air is fed into the processing vessel 10 from an air supply source connected to an ozone gas supply pipe 42 for feeding ozone gas into the processing vessel 10, whereby an atmosphere of the ozone gas in the processing vessel 10 is replaced with an atmosphere of the air.
    Type: Application
    Filed: May 28, 2002
    Publication date: December 12, 2002
    Applicant: TOKYO ELECTRON LIMITED
    Inventors: Takayuki Toshima, Naoki Shindo, Tadashi Iino
  • Patent number: 6491452
    Abstract: When a resist film formed on a substrate is exposed in a predetermined pattern and thereafter an exposed pattern is developed, a substance capable of decreasing fluidity of the developing solution is added to the developing solution, the developing solution to which the substance is added is caused to become low-fluid under a predetermined condition, the developing solution is applied onto the exposed resist film on the substrate, and thereafter a predetermined trigger is given to the developing solution to cause the developing solution to become high-fluid so as to allow developing to progress. Thereby, line width can be made uniform and defects do not tend to occur during coating of the developing solution.
    Type: Grant
    Filed: April 11, 2001
    Date of Patent: December 10, 2002
    Assignee: Tokyo Electron Limited
    Inventors: Nobuo Konishi, Takayuki Toshima, Tsutae Omori
  • Publication number: 20020155709
    Abstract: While supplying DHF as a chemical liquid to wafers W each having a resist pattern formed on the surface, oxidation films on the wafers W are eliminated by etching and successively, the surfaces of the wafers W are cleaned by supplying the wafers W with a rinsing liquid. Subsequently, by supplying an ozone water of a predetermined concentration, oxidation films are formed on the wafers W in order to make their surfaces hydrophilic. Then, N2-gas (dry gas) is supplied to the wafers W in order to remove moisture adhering to the surfaces of the wafers W. In this way, it is possible to prevent an occurrence of water-marks on the wafers W without collapsing the resist patterns formed on the wafers W, allowing both quality and yield rate of the wafers to be improved.
    Type: Application
    Filed: October 19, 2001
    Publication date: October 24, 2002
    Applicant: TOKYO ELECTRON LIMITED
    Inventors: Takayuki Toshima, Miyako Yamasaka
  • Publication number: 20020122670
    Abstract: A solution having a photosensitive radical is applied onto a resist film, a developing solution is applied thereonto, and the entire surface of the solution having the photosensitive radical is exposed all at once. Developing of the resist film progresses all at once after a coating film of the solution having the photosensitive radical dissolves in the developing solution, and hence time difference in the start time of developing does not occur in the surface of a substrate, thereby enabling uniform developing and an improvement in line width uniformity (CD value uniformity) in the surface of the substrate.
    Type: Application
    Filed: March 29, 2002
    Publication date: September 5, 2002
    Inventors: Takayuki Toshima, Tsutae Omori, Yoshio Kimura
  • Publication number: 20020096196
    Abstract: A substrate processing apparatus 8 for feeding a processing liquid and processing a substrate W with the processing liquid comprises holding member 22 for holding the substrate W, and a lower side member 42 which is moved relatively with respect to the back surface of the substrate W held by the holding member 22 between a processing position A near the substrate undersurface and a retreat position B remote from the substrate undersurface. The processing liquid is fed between a gap between the lower side member 42 moved to the processing position A and the back surface of the substrate held by the holding member 22, and the substrate undersurface is processed.
    Type: Application
    Filed: January 23, 2002
    Publication date: July 25, 2002
    Inventors: Takayuki Toshima, Takehiko Orii
  • Patent number: 6398429
    Abstract: A solution having a photosensitive radical is applied onto a resist film, a developing solution is applied thereonto, and the entire surface of the solution having the photosensitive radical is exposed all at once. Developing of the resist film progresses all at once after a coating film of the solution having the photosensitive radical dissolves in the developing solution, and hence time difference in the start time of developing does not occur in the surface of a substrate, thereby enabling uniform developing and an improvement in line width uniformity (CD value uniformity) in the surface of the substrate.
    Type: Grant
    Filed: March 13, 2000
    Date of Patent: June 4, 2002
    Assignee: Tokyo Electron Limited
    Inventors: Takayuki Toshima, Tsutae Omori, Yoshio Kimura
  • Publication number: 20020045008
    Abstract: Resists can be removed while metal contamination of wafers, etc. and generation of particles, and growth of oxide films are suppressed.
    Type: Application
    Filed: October 3, 2001
    Publication date: April 18, 2002
    Applicant: TOKYO ELECTRON LIMITED
    Inventors: Takayuki Toshima, Naoki Shindo, Tadashi Iino
  • Publication number: 20020037371
    Abstract: The wafers W are dipped and rinsed in pure water in the processing bath 60, and then dichloromethane is fed into the processing bath 60, thereby changing the state of the wafer W from being dipped in pure water to being dipped in dichloromethane. Thereafter, the wafers W is raised up to the drying chamber 61, and dichloromethane remained on the surface of each wafer W is evaporated, and the hot N2 gas is discharged onto the wafers W. Thereby, no water marks are produced, and no resist is dissolved, and the substrate can be dried in safety.
    Type: Application
    Filed: May 15, 2001
    Publication date: March 28, 2002
    Inventors: Yoshio Kumagai, Takayuki Toshima
  • Publication number: 20010032396
    Abstract: The present invention provides a substrate processing apparatus and method which can prevent accidents in advance so as to ensure safety against interruption of operations of the apparatus and leakage of processing substances. In a substrate processing method in which wafers W are processed are processed by feeding an ozone gas 5 to the wafers W loaded in a processing vessel 2 while an interior atmosphere in the processing vessel is being exhausted to be passed through an ozone killer 10, the ozone gas 5is fed under the conditions that the processing vessel 2 is tightly closed, and the ozone killer in its normal state. When the processing is interrupted, an interior atmosphere in the processing vessel 2 is forcedly exhausted. When the gas leaks, the interior atmosphere and a peripheral atmosphere of the processing vessel 2 are forcedly exhausted while the feed of the ozone gas 5 is paused.
    Type: Application
    Filed: April 20, 2001
    Publication date: October 25, 2001
    Inventors: Takayuki Toshima, Tadashi Iino
  • Publication number: 20010024767
    Abstract: On the occasion of developing processing, a mixed solution produced by stirring a developing solution and a solution with a specific gravity smaller than the developing solution is supplied to the front surface of a substrate and left as it is for a fixed period of time. After the mixed solution is separated into two layers of which the lower layer is the developing solution and the upper layer is the solution, developing progresses all at once in the entire surface of the substrate. Hence, time difference in start time of developing does not occur in the surface of the substrate, thereby enabling uniform developing and an improvement in line width uniformity of a resist pattern film in the surface of the substrate.
    Type: Application
    Filed: March 9, 2001
    Publication date: September 27, 2001
    Applicant: TOKYO ELECTRON LIMITED TBS Broadcast Center
    Inventors: Takayuki Toshima, Takehiko Orii
  • Publication number: 20010014224
    Abstract: A solvent of a resist solution is dropped from a solvent supply nozzle onto the surface of a semiconductor wafer held by a spin chuck. The semiconductor wafer is rotated by the spin chuck to spread the resist solution over the entire surface of the semiconductor wafer W. Simultaneously, the resist solution is dropped from a resist solution supply nozzle onto the semiconductor wafer and spread following the solvent. During the processing, the processing space is isolated from the outer atmosphere by closing a lid of a processing vessel and a sprayed solvent is supplied into the processing space. The processing space is thus filled with the mist of solvent. In the processing space supplied with the solvent, evaporation of the solvent from the resist solution is suppressed. A film of the resist solution is formed with a uniform film thickness to the edge of the semiconductor wafer W.
    Type: Application
    Filed: March 26, 2001
    Publication date: August 16, 2001
    Inventors: Keizo Hasebe, Shuuichi Nishikido, Nobuo Konishi, Takayuki Toshima, Kazutoshi Yoshioka
  • Publication number: 20010012456
    Abstract: When a resist film formed on a substrate is exposed in a predetermined pattern and thereafter an exposed pattern is developed, a substance capable of decreasing fluidity of the developing solution is added to the developing solution, the developing solution to which the substance is added is caused to become low-fluid under a predetermined condition, the developing solution is applied onto the exposed resist film on the substrate, and thereafter a predetermined trigger is given to the developing solution to cause the developing solution to become high-fluid so as to allow developing to progress. Thereby, line width can be made uniform and defects do not tend to occur during coating of the developing solution.
    Type: Application
    Filed: April 11, 2001
    Publication date: August 9, 2001
    Inventors: Nobuo Konishi, Takayuki Toshima, Tsutae Omori
  • Publication number: 20010009135
    Abstract: A solvent of a resist solution is dropped from a solvent supply nozzle onto the surface of a semiconductor wafer held by a spin chuck. The semiconductor wafer is rotated by the spin chuck to spread the resist solution over the entire surface of the semiconductor wafer W. Simultaneously, the resist solution is dropped from a resist solution supply nozzle onto the semiconductor wafer and spread following the solvent. During the processing, the processing space is isolated from the outer atmosphere by closing a lid of a processing vessel and a sprayed solvent is supplied into the processing space. The processing space is thus filled with the mist of solvent. In the processing space supplied with the solvent, evaporation of the solvent from the resist solution is suppressed. A film of the resist solution is formed with a uniform film thickness to the edge of the semiconductor wafer W.
    Type: Application
    Filed: March 26, 2001
    Publication date: July 26, 2001
    Inventors: Keizo Hasebe, Shuuichi Nishikido, Nobuo Konishi, Takayuki Toshima, Kazutoshi Yoshioka
  • Patent number: 6257778
    Abstract: When the surface of a substrate is developed, a developing solution in low state of development function is supplied to the surface of the substrate. Thereafter, the development function of the supplied developing solution is improved. Thus, the surface of the substrate is developed. When the developing solution is supplied to the surface of the substrate, the developing solution does not develop the surface of the substrate. Thus, even if there is a time lag of the developing solution supplied on the surface, the surface of the substrate is equally developed.
    Type: Grant
    Filed: February 3, 1999
    Date of Patent: July 10, 2001
    Assignee: Tokyo Electron Limited
    Inventors: Takayuki Toshima, Nobuo Konishi
  • Publication number: 20010004066
    Abstract: The present invention is a substrate processing method for etching a substrate having a wiring layer, an insulating layer, and a resist layer provided on the surface to form a contact hole in the insulating layer, and removing the resist layer and a polymer layer adhered to at least the surface of the contact hole from the substrate after etching. The substrate processing method includes a first step of making the surfaces 6 of the resist layer 3 and the polymer layer 5 existing on the substrate W hydrophilic. In a second step, the resist layer and polymer layer are removed by a processing liquid thereafter.
    Type: Application
    Filed: December 15, 2000
    Publication date: June 21, 2001
    Applicant: TOKYO ELECTRON LIMITED OF JAPAN
    Inventors: Takayuki Toshima, Takehiko Orii
  • Patent number: 6238848
    Abstract: When a resist film formed on a substrate is exposed in a predetermined pattern and thereafter an exposed pattern is developed, a substance capable of decreasing fluidity of the developing solution is added to the developing solution, the developing solution to which the substance is added is caused to become low-fluid under a predetermined condition, the developing solution is applied onto the exposed resist film on the substrate, and thereafter a predetermined trigger is given to the developing solution to cause the developing solution to become high-fluid so as to allow developing to progress. Thereby, line width can be made uniform and defects do not tend to occur during coating of the developing solution.
    Type: Grant
    Filed: March 31, 2000
    Date of Patent: May 29, 2001
    Assignee: Tokyo Electron Limited
    Inventors: Nobuo Konishi, Takayuki Toshima, Tsutae Omori
  • Patent number: 6228561
    Abstract: A solvent of a resist solution is dropped from a solvent supply nozzle onto the surface of a semiconductor wafer held by a spin chuck. The semiconductor wafer is rotated by the spin chuck to spread the resist solution over the entire surface of the semiconductor wafer W. Simultaneously, the resist solution is dropped from a resist solution supply nozzle onto the semiconductor wafer and spread following the solvent. During the processing, the processing space is isolated from the outer atmosphere by closing a lid of a processing vessel and a sprayed solvent is supplied into the processing space. The processing space is thus filled with the mist of solvent. In the processing space supplied with the solvent, evaporation of the solvent from the resist solution is suppressed. A film of the resist solution is formed with a uniform film thickness to the edge of the semiconductor wafer W.
    Type: Grant
    Filed: January 31, 1997
    Date of Patent: May 8, 2001
    Assignee: Tokyo Electron Limited
    Inventors: Keizo Hasebe, Shuuichi Nishikido, Nobuo Konishi, Takayuki Toshima, Kazutoshi Yoshioka
  • Patent number: 6143478
    Abstract: A resist processing method includes (a), to a substrate having a circuit pattern with an uneven surface formed thereon, coating a photoresist solution to, by doing so, form a photoresist film, (b) subjecting the substrate to heat processing to cause a portion of the photoresist film to be chemically modified to create a modified resist layer of a substantially uniform thickness from the uneven surface of the circuit pattern, and (c) selectively removing only a resist portion unmodified at the step (b) to leave a modified resist layer on the uneven surface of the circuit pattern.
    Type: Grant
    Filed: May 19, 1998
    Date of Patent: November 7, 2000
    Assignee: Tokyo Electron Limited
    Inventors: Takayuki Toshima, Nobuo Konishi
  • Patent number: 6097469
    Abstract: A method of forming a resist on a substrate and processing the resist in a resist processing system having a processing region and a non-processing region which are air-conditioned, the method comprising the steps of, transferring the substrate into the non-processing region, coating the resist on the substrate, exposing the coated resist, developing the exposed resist, subjecting the coated resist at least once, to heat treatment in a period from the transferring step to the developing step, detecting at least once, the concentration of an alkaline component which causes defective resolution of the resist in a processing atmosphere in a period from the transferring step to the developing step, setting a threshold value for the concentration of the alkaline component in the processing atmosphere which causes the defective resolution of the resist, and controlling and changing at least one processing atmosphere in the steps in accordance with a detected concentration of the alkaline component and the threshold
    Type: Grant
    Filed: March 29, 1999
    Date of Patent: August 1, 2000
    Assignee: Tokyo Electron Limited
    Inventors: Hidetami Yaegashi, Yasunori Kawakami, Jae Hoon Park, Keiko Kanzawa, Takayuki Katano, Takayuki Toshima, Yuji Kakazu